amniocentesis
Pronunciation: am-nee-oh-sen-TEE-sis
A prenatal diagnostic procedure involving withdrawal of amniotic fluid for genetic testing.
Full Definition
Amniocentesis is an invasive diagnostic test typically performed between 15-20 weeks of pregnancy. A thin needle is inserted through the abdomen into the amniotic sac to extract fluid containing fetal cells for chromosomal analysis. The procedure can detect conditions such as Down syndrome, spina bifida, and other genetic disorders. While highly accurate, it carries a small risk of miscarriage. This term appears frequently in prenatal counseling documents, consent forms, and genetic screening protocols that medical editors review.
Usage
Usage note: Often abbreviated as 'amnio' in informal medical communication, but full term should be used in formal documentation.
In Context
- "Amniocentesis revealed a normal karyotype of 46,XY in the male fetus." — Genetic counseling report
- "The couple declined amniocentesis after discussing the risks and benefits with their physician." — Prenatal consultation note